Here is the method of online search, a comprehensive, pro-test
Reason:
Apple requires the addition of a UUID certificate to ensure the stability of the plugin.
Workaround:
First, see the UUID of Xcode
Perform defaults read/applications/xcode.app/contents/info Dvtplugincompatibilityuuid in terminal
Copies the selected string.
1. Open the directory where the Xcode plugin is located: ~/library/application support/developer/shared/xcode/plug-ins;
2, select the installed plug-in such as Vvdocumenter-xcode, right-click "Show Package Content";
3. Locate the Info.plist file, find the Dvtplugincompatibilityuuids item, add a Item,value value for the previous Xcode uuid, save.
Second, re-start Xcode
After Xcode 6, restart Xcode will prompt "load bundle", "Skip bundle", here must choose "Load Bundle", or plug-in can not be used.
But I tried and did not appear this interface, so Google a bit, continue the following operation:
Exit Xcode and the terminal will restart Xcode after executing the command below, and you'll see the above dialog box, select "Load bundles" and then solve the problem!
Defaults Delete Com.apple.dt.Xcode dvtpluginmanagernonappleplugins-xcode-6.4
Troubleshoot issues that plug-ins cannot use after Xcode6.4 install plugins